/**
 * 收到请求时，把网页相应回去
 * http://localhost:8081/
 * 蒋index.html响应到前端
 */
 const http = require("http");
 const url = require("url")
 const fs = require("fs")
 const path = require("path");
 const https = require("https")
 const cheerio = require("cheerio");
 var reqUrl = "https://maoyan.com/films"
 var movieList = []
 
 http.createServer((req,res)=>{
     var urlObj = url.parse(req.url)
     var pathname = urlObj.pathname
     if(pathname == "/"){
         var filePath = path.join(__dirname,"/index.html");
         fs.readFile(filePath,(err,data)=>{
             if(err){
                 console.log(err);
             }
             else{
                 res.writeHead(200,{"Content-Type":"text/html;charset=utf-8"})
                 res.write(data);
                 res.end();
             }
            
         })
     }
     else if(pathname == '/getlist'){
         https.get(reqUrl,(resObj)=>{
             var htmlStr = ""
             resObj.on("data",(chunk)=>{
                 htmlStr += chunk;
             })
             resObj.on("end",()=>{
                 var $ = cheerio.load(htmlStr);
                 $(".movie-item-title a").each((i,el)=>{
                    var movieName = $(el).text()
                    var movieId = $(el).attr("data-val")
                    movieId = movieId.slice(movieId.indexOf(":")+1,-1)
                    var num1 = $(el).parent().next().children(".integer").text()
                    var num2 = $(el).parent().next().children(".fraction").text()
                    var movieRate = num1+num2
                    var movieObj = {movieId:movieId,movieName:movieName,movieRate:movieRate}
                    movieList.push(movieObj)
                 })
                 res.writeHead(200,{"Content-Type":"text/plain"})
                 res.write(JSON.stringify(movieList))
                 res.end()
             })
         })
     }
 }).listen(8081)